Repair of Morganza Spillway Bridge bent pile cap using carbon fiber reinforcement (CFR).

Details

• Creators:
  Gopu, Vijaya ; Balaguru, Perumalsamy N.
• Corporate Contributors:
  Louisiana Transportation Research Center
• Subject/TRT Terms:
  • Pile caps
  • Bents
  • Bridge piers
  • Fiber reinforced concrete Morganza Spillway Bridge
  • Pile cap repair
  • carbon fibers
  • inorganic-polymer
• Publication/ Report Number:
  FHWA/LA.15/552
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The pile cap of an end bent of the Morganza Spillway Bridge suffered extensive damage at the girder bearing locations, ; particularly on the side where the pounding of the girders by the adjacent concrete deck located on the approach side of the ; bent. The primary repair of the damaged pile cap and the replacement of the bearing plates were completed by the ; contractor working on the project. Structural grade high-adhesive material epoxy concrete was utilized to patch the damaged ; areas of the pile cap. In similar repairs conducted earlier, the repair under the bearing plates delaminated. Therefore, the ; repaired areas of the pile cap, namely the bearing plate locations, were strengthened by preventing delamination of the ; repair material by confining it with high modulus carbon composite wrapping. An inorganic polymer coating that provides ; UV protection and prevention of deterioration was applied to the entire pile cap surface. This coating also has self-cleaning ; properties that will prevent and eliminate the growth of any mold or mildew and deposits of organic materials. The project ; was conducted to demonstrate the application of high strength composites for rehabilitation of transportation infrastructure. ; Overall, the project was a complete success. The systems cured within 24 hours and rain on the second day of the repair ; process had no ill effects on the system. There was no distress of any kind in either the repair zone or the coating during the ; entire two-year monitoring period. Because the system is inorganic, it is expected to function properly for 10 to 30 years. ; This composite has shown long-term durability as the first application was 20 years ago and is still performing well with no ; distress. Even debris that came through the construction expansion joint did not scratch or damage the coated surface. This ; project also provided an opportunity to demonstrate the self-cleaning properties of the coating. The uncoated surface ; (behind the scaffolding during the repair) was covered with mold and mildew growth, whereas the coated surface was ; completely clean. Preparation of the resin and placement of the carbon reinforcement was easily carried out by students and ; therefore trained personnel, such as DOTD maintenance crews, can easily use this coating and resin systems for future ; applications.
  More +
• Format:
  PDF
• Funding:
  LTRC Project No. 12-3ST;SIO No. 3000724
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30755/dot_30755_DS1.pdf
• File Type:
  [PDF - 4.13 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:44236faabe0173336c6a0b8426ac2d63740b8d05ba965627435cbda15d79814f00bd2a8f15fac204ead4bc6bd6e92aa2f931a962c2d9282c93cae8d4d53f57ea